5126660065 has 4 divisors (see below), whose sum is σ = 6151992084. Its totient is φ = 4101328048.

The previous prime is 5126660059. The next prime is 5126660101. The reversal of 5126660065 is 5600666215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3073482721 + 2053177344 = 55439^2 + 45312^2 .

It is a cyclic number.

It is not a de Polignac number, because 5126660065 - 2²¹ = 5124562913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512666002 + ... + 512666011.

It is an arithmetic number, because the mean of its divisors is an integer number (1537998021).

Almost surely, 2^5126660065 is an apocalyptic number.

It is an amenable number.

5126660065 is a deficient number, since it is larger than the sum of its proper divisors (1025332019).

5126660065 is a wasteful number, since it uses less digits than its factorization.

5126660065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025332018.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 5126660065 is about 71600.6987745231. The cubic root of 5126660065 is about 1724.2947550468.

The spelling of 5126660065 in words is "five billion, one hundred twenty-six million, six hundred sixty thousand, sixty-five".